Aluminum Sulfate



No known benefits

Aluminum Sulfate at a glance

  • Salt of aluminum
  • Used as a food additive and medical anticoagulant
  • Frequently used in deodorant as an absorbent
  • Also an astringent
  • Can cause skin sensitivity

Aluminum Sulfate description

Aluminum sulfate is a salt of aluminum. It has numerous commercial and retail applications, including as a food additive and anticoagulant in medical settings. It is also used in water treatment to coagulate (change a fluid to a semi-solid or solid state) impurities so they can be filtered out. In cosmetics, aluminum sulfate is known for its absorbent and astringent properties and is a frequent additive in deodorants. It can create a tingling or cooling sensation when applied to skin. Though aluminum sulfate is deemed Generally Recognized as Safe (GRAS) by the United States FDA, it can cause skin irritation, especially in those sensitive to aluminum. Note that this side effect can be more pronounced when applied via deodorant to just-shaved underarms. In its raw form, aluminum sulfate is a white crystalline solid. Amounts between 15–25% are standard when this ingredient is used in deodorants. Other cosmetics typically contain less than 1% aluminum sulfate. Interestingly, clinical studies of persons with known allergies to dust mites, pet dander and more showed that topical use of aluminum sulfate blunted the allergen’s impact on skin.

Aluminum Sulfate references

  • CosmeticsInfo.Org, Website
  • Clinical and Molecular Allergy, February 2006, pages 1–9

Peer-reviewed, substantiated scientific research is used to assess ingredients in this dictionary. Regulations regarding constraints, permitted concentration levels and availability vary by country and region.

Ingredient ratings


Proven and supported by independent studies. Outstanding active ingredient for most skin types or concerns.


Necessary to improve a formula's texture, stability, or penetration.


Generally non-irritating but may have aesthetic, stability, or other issues that limit its usefulness.


There is a likelihood of irritation. Risk increases when combined with other problematic ingredients.


May cause irritation, inflammation, dryness, etc. May offer benefit in some capability but overall, proven to do more harm than good.


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Not rated

We have not yet rated this ingredient because we have not had a chance to review the research on it.